#!/usr/bin/make -f

# enable verbose build messages
export DH_VERBOSE=1

# enable all build hardening flags
export DEB_BUILD_MAINT_OPTIONS=hardening=+all

# needed to avoid build system choosing clang as the compiler
export CC=gcc
export CXX=g++

# build with gcc instead of clang
defines=is_clang=false clang_use_chrome_plugins=false

# more verbose linker output
defines+=target_extra_ldflags=\"-Wl,--stats\"

# avoid error in v8's garbage collector (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=68853)
defines+=target_extra_cxxflags=\"-fno-delete-null-pointer-checks\"

DEB_HOST_ARCH ?= $(shell dpkg-architecture -qDEB_HOST_ARCH)

# set the appropriate cpu architecture
ifeq (i386,$(DEB_HOST_ARCH))
defines+=host_cpu=\"x86\"
endif
ifeq (amd64,$(DEB_HOST_ARCH))
defines+=host_cpu=\"x64\"
endif
ifeq (arm64,$(DEB_HOST_ARCH))
defines+=host_cpu=\"arm64\"
endif
ifeq (armhf,$(DEB_HOST_ARCH))
defines+=host_cpu=\"arm\" arm_use_neon=true symbol_level=0
endif

# disabled features
defines+=is_debug=false \
         use_gtk3=false \
         use_ozone=false \
         use_sysroot=false \
         use_openh264=false \
         use_jumbo_build=false \
         use_custom_libcxx=false \
         use_gnome_keyring=false \
         use_system_harfbuzz=false \
         rtc_libvpx_build_vp9=false \
         treat_warnings_as_errors=false \
         remove_webcore_debug_symbols=true \
         optimize_webui=false \
         enable_nacl=false \
         enable_nacl_nonsfi=false \
         enable_google_now=false \
         enable_hangout_services_extension=false \
         enable_iterator_debugging=false \
         goma_dir=\"\" \
         gold_path=\"\" \
         linux_use_bundled_binutils=false \

# enabled features
defines+=use_gio=true \
         use_gold=true \
         use_pulseaudio=true \
         link_pulseaudio=true \
         enable_widevine=true \
         use_libjpeg_turbo=true \
         use_system_libjpeg=true \
         use_system_freetype=true \
         concurrent_links=1 \
         use_jumbo_build=true \
         jumbo_file_merge_limit=16 \
         proprietary_codecs=true \
         ffmpeg_branding=\"Chrome\" \
         fieldtrial_testing_like_official_build=true \

# some notes about embedded libraries
#  can't use system nss since net/third_party/nss is heavily patched
#  can't use system ots (open text *summarizer*) since that's not google's ots (open text *sanitizer*)

# handle parallel build options
ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
njobs=-j$(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
endif

# paths to files needed by flot
flotpaths=/usr/share/javascript/jquery/*min.js \
          /usr/share/javascript/jquery-flot/*min.js \

%:
	dh $@ --parallel

override_dh_auto_configure:
	# output compiler information
	$(CXX) --version
	# use system flot
	for file in $(flotpaths); do ln -sf $$file third_party/flot; done
	# strip out system third_party libraries
	rm -f build/config/freetype/freetype.gni
	mkdir -p base/third_party/libevent
	./debian/scripts/unbundle
	# build gn
	./tools/gn/bootstrap/bootstrap.py -s $(njobs)
	# configure
	./out/Release/gn gen out/Release --args="$(defines)"

override_dh_auto_build-arch:
	./out/Release/gn gen out/Release --args="$(defines)"
	ninja $(njobs) -C out/Release chrome chrome_sandbox content_shell chromedriver
	mv out/Release/chrome out/Release/chromium || true
	mv out/Release/content_shell out/Release/chromium-shell || true
	mv out/Release/chrome_sandbox out/Release/chrome-sandbox || true
	mv out/Release/locales/en-US.pak out/Release/resources || true
	chmod 4755 out/Release/chrome-sandbox # suid sandbox
	sed -e s/@@PACKAGE@@/chromium/g -e s/@@MENUNAME@@/chromium/g \
	    < chrome/app/resources/manpage.1.in > out/Release/chromium.1

override_dh_auto_build-indep:
	ninja $(njobs) -C out/Release packed_resources
	rm -f out/Release/locales/en-US.pak

override_dh_auto_install-arch:
	dh_auto_install
	# create /etc/chromium.d README file
	echo "Any files placed in this directory will be sourced prior to executing chromium." \
	    > debian/chromium/etc/chromium.d/README
	# update launcher script with build information
	sed 's|@BUILD_DIST@|$(shell cat /etc/debian_version)|' \
	    < debian/scripts/chromium > debian/chromium/usr/bin/chromium
	# move icons into /usr/share
	for file in $(shell find chrome/app/theme/chromium -name product_logo_[0-9]* -a ! -name *mono*); do \
	    ext=$$(echo $$file | cut -d\. -f2); \
	    siz=$$(echo $$file | cut -d_ -f3 | sed s/\.$$ext//); \
	    dst=debian/chromium/usr/share/icons/hicolor/$$siz\x$$siz/apps; \
	    mkdir -p $$dst; \
	    cp $$file $$dst/chromium.$$ext; \
	    done

override_dh_fixperms:
	dh_fixperms --exclude chrome-sandbox

override_dh_strip:
	# this line can be removed once stretch is released
	dh_strip --remaining-packages --ddeb-migration='chromium-dbg (<< 47.0.2526.80-4~)'

override_dh_gencontrol:
	dh_gencontrol -- -VBuilt-Using="$(shell dpkg-query -f '$${source:Package} (= $${source:Version}), ' -W libjs-jquery libjs-jquery-flot)"

override_dh_auto_clean:
	rm -rf out
	find . -name \*.pyc -execdir rm -f {} \;
	dh_auto_clean

###################### upstream source downloading ############################

url=https://gsdview.appspot.com/chromium-browser-official
version=$(shell dpkg-parsechangelog -S Version | sed s/-.*//)
tarball=chromium-$(version).tar.xz
removed=chromium-browser_$(version).files-removed

get-orig-source:
	wget -nv --show-progress -c $(url)/$(tarball) -O ../$(tarball)
	mk-origtargz ../$(tarball) | tee ../$(removed)
	echo >> ../$(removed)
	tar tf ../$(tarball) | sort > ../chromium.upstream
	tar tf ../chromium-browser_$(version).orig.tar.xz | sort > ../chromium.orig
	diff -u ../chromium.upstream ../chromium.orig >> ../$(removed) || true
